ci: add area/dependency label for dependabot PRs

Signed-off-by: Anish Ramasekar <[email protected]>

Author: aramase

.github/dependabot.yml

@@ -7,6 +7,7 @@ updates:
     commit-message:
       prefix: "chore"
     labels:
+      - "area/dependency"
       - "ok-to-test"
 
   - package-ecosystem: "gomod"
@@ -16,6 +17,7 @@ updates:
     commit-message:
       prefix: "chore"
     labels:
+      - "area/dependency"
       - "ok-to-test"
 
   - package-ecosystem: docker
@@ -25,6 +27,7 @@ updates:
     commit-message:
       prefix: "chore"
     labels:
+      - "area/dependency"
       - "ok-to-test"
 
   - package-ecosystem: docker
@@ -34,6 +37,7 @@ updates:
     commit-message:
       prefix: "chore"
     labels:
+      - "area/dependency"
       - "ok-to-test"
 
   - package-ecosystem: docker
@@ -43,6 +47,7 @@ updates:
     commit-message:
       prefix: "chore"
     labels:
+      - "area/dependency"
       - "ok-to-test"
 
   - package-ecosystem: gomod
@@ -52,4 +57,5 @@ updates:
     commit-message:
       prefix: "chore"
     labels:
+      - "area/dependency"
       - "ok-to-test"